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A287186
Positions of 1 in A287457; complement of A287519.
3
1, 9, 16, 23, 27, 35, 42, 46, 50, 57, 64, 68, 72, 79, 83, 91, 98, 105, 109, 117, 124, 128, 132, 139, 143, 151, 155, 163, 170, 174, 178, 185, 192, 196, 200, 207, 211, 219, 223, 231, 238, 242, 246, 253, 257, 265, 272, 279, 283, 291, 298, 302, 306, 313, 320
OFFSET
1,2
COMMENTS
Conjecture: a(n)/n -> 1.20..., and if m denotes this number, then -1 < m - a(n)/n) < 1 for n >= 1.
LINKS
MATHEMATICA
s = {0, 0}; w[0] = StringJoin[Map[ToString, s]];
w[n_] := StringReplace[w[n - 1], {"00" -> "1000", "10" -> "000"}]
Table[w[n], {n, 0, 8}]
st = ToCharacterCode[w[23]] - 48 (* A287457 *)
Flatten[Position[st, 0]] (* A287519 *)
Flatten[Position[st, 1]] (* A287186 *)
CROSSREFS
Sequence in context: A095961 A356295 A045911 * A134256 A199859 A046463
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jun 18 2017
STATUS
approved